Three women were concurrent owners of a parcel of real estate. Upon one death, her interest became part of her estate. What was the deceased's ownership type?

The fact that the deceased woman's interest became part of her estate indicates that she did not have a right of survivorship, which is a feature of joint tenancy. In a joint tenancy, when one owner dies, their interest automatically passes to the surviving joint tenants rather than entering the deceased’s estate.

On the other hand, a tenancy in common allows each owner to hold an individual, distinct share of the property. When a tenant in common dies, their share does not automatically pass to the other tenants but instead becomes part of the deceased's estate, which can then be distributed according to their will or state law if no will exists.

Therefore, in this scenario, the deceased woman’s ownership type must have been as a tenant in common, since her interest in the property was able to go into her estate upon her death, allowing that share to be passed on to her heirs or designated beneficiaries.